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    Digital signal processing system
    1.
    发明授权
    Digital signal processing system 有权

    公开(公告)号：US11769478B1

    公开(公告)日：2023-09-26

    申请号：US17376959

    申请日：2021-07-15

    申请人： Dialog Semiconductor B.V.

    发明人： Wessel Harm Lubberhuizen ,  Johannes Steensma

    IPC分类号： G10K11/178

    CPC分类号： G10K11/17855 ,  G10K2210/1081 ,  G10K2210/3012 ,  G10K2210/3051

    摘要： A digital signal processing system for multiplying a digital value and a digital signal. The digital signal processing system receives the digital value in an encoded format, and multiplies the digital value with the digital signal. The digital value in the encoded format has an offset, which is encoded as a floating point. The disclosure provides a digital processing system that can carry out a multiplication operation with a smaller area, less complexity and/or reduced power usage compared with known multipliers.

    MUSIC COMPENSATION FOR ACTIVE NOISE CONTROL SYSTEMS
    4.
    发明申请
    MUSIC COMPENSATION FOR ACTIVE NOISE CONTROL SYSTEMS 有权

    公开(公告)号：US20170140747A1

    公开(公告)日：2017-05-18

    申请号：US15348042

    申请日：2016-11-10

    申请人： Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America

    发明人： DARREL RAY JUDD

    IPC分类号： G10K11/178

    CPC分类号： G10K11/178 ,  G10K11/17883 ,  G10K11/17885 ,  G10K2210/1282 ,  G10K2210/3051 ,  G10K2210/511

    摘要： A vehicle includes a music signal processing system having a loudspeaker disposed within a passenger compartment of the vehicle and emitting audible music into the passenger compartment. A microphone is disposed within the passenger compartment and converts the audible music and noise within the passenger compartment into an analog electrical microphone signal. An analog-to-digital converter is connected to an output of the microphone and receives the analog electrical microphone signal and converts the analog electrical microphone signal into a digital electrical microphone signal. A sample rate down converter is connected to an output of the analog-to-digital converter. A narrow band adaptive noise control is connected to an output of the sample rate down converter and receives an engine speed signal. A sample rate up converter is connected to an output of the narrow band adaptive noise control. An adder device adds an output of the sample rate up converter to a music signal. A digital-to-analog converter is connected to an output of the adder device. An amplifier has an input connected to an output of the digital-to-analog converter. An output of the amplifier is connected to an input of the loudspeaker.

    Internal dynamic range control in an adaptive noise cancellation (ANC) system
    5.
    发明授权
    Internal dynamic range control in an adaptive noise cancellation (ANC) system 有权
    自适应噪声消除（ANC）系统中的内部动态范围控制

    公开(公告)号：US09369798B1

    公开(公告)日：2016-06-14

    申请号：US13794979

    申请日：2013-03-12

    申请人： Cirrus Logic, Inc.

    发明人： Jeffrey Alderson ,  Jon D. Hendrix ,  Gautham Devendra Kamath

    IPC分类号： A61F11/06 ,  G10K11/16 ,  H03B29/00 ,  H04B15/00 ,  H04R3/00

    CPC分类号： H04R3/002 ,  G10K11/178 ,  G10K11/17854 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3051 ,  H04R1/1083 ,  H04R2410/05 ,  H04R2460/01

    摘要： A personal audio device, such as a headphone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal using one or more microphone signals that measure the ambient audio. The anti-noise signal is combined with source audio to provide an output for a speaker. The anti-noise signal causes cancellation of ambient audio sounds that appear in the microphone signals. A processing circuit uses the reference microphone to generate the anti-noise signal using one or more adaptive filters. The processing circuit also includes low-pass filters that remove quantization noise images at the output of the adaptive filter to reduce the dynamic range required at the output of the adaptive filter.

    摘要翻译： 诸如耳机的个人音频设备包括使用测量环境音频的一个或多个麦克风信号自适应地生成抗噪声信号的自适应噪声消除（ANC）电路。 抗噪声信号与源音频相结合，为扬声器提供输出。 抗噪声信号会导致消除麦克风信号中出现的环境音频声音。 处理电路使用参考麦克风使用一个或多个自适应滤波器产生抗噪声信号。 处理电路还包括低通滤波器，其在自适应滤波器的输出处去除量化噪声图像，以减少在自适应滤波器的输出处所需的动态范围。

    ADAPTIVE NOISE CANCELING ARCHITECTURE FOR A PERSONAL AUDIO DEVICE
    7.
    发明申请
    ADAPTIVE NOISE CANCELING ARCHITECTURE FOR A PERSONAL AUDIO DEVICE 有权
    适应噪音取消个人音乐设备的架构

    公开(公告)号：US20120308025A1

    公开(公告)日：2012-12-06

    申请号：US13413920

    申请日：2012-03-07

    申请人： Jon D. Hendrix ,  Gautham Devendra Kamath ,  Nitin Kwatra ,  Ali Abdollahzadeh Milani ,  Jeffrey Alderson

    发明人： Jon D. Hendrix ,  Gautham Devendra Kamath ,  Nitin Kwatra ,  Ali Abdollahzadeh Milani ,  Jeffrey Alderson

    IPC分类号： G10K11/16

    CPC分类号： G10K11/178 ,  G10K11/17827 ,  G10K11/17854 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/30232 ,  G10K2210/3026 ,  G10K2210/3028 ,  G10K2210/3051 ,  G10K2210/3055 ,  H04R1/1083 ,  H04R3/005

    摘要： A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio and an error microphone signal that measures the output of an output transducer plus any ambient audio at that location and injects the anti-noise signal at the transducer output to cause cancellation of ambient audio sounds. A processing circuit uses the reference and error microphone to generate the anti-noise signal, which can be generated by an adaptive filter operating at a multiple of the ANC coefficient update rate. Downlink audio can be combined with the high data rate anti-noise signal by interpolation. High-pass filters in the control paths reduce DC offset in the ANC circuits, and ANC coefficient adaptation can be halted when downlink audio is not detected.

    摘要翻译： 诸如无线电话的个人音频设备包括自适应噪声消除（ANC）电路，其自适应地从测量环境音频的参考麦克风信号产生抗噪声信号，以及测量输出的输出的误差麦克风信号 传感器加上该位置的任何环境音频，并在传感器输出端注入抗噪声信号，以引起环境音频声音的消除。 处理电路使用参考误差麦克风来产生抗噪声信号，该噪声信号可以由以ANC系数更新率的倍数操作的自适应滤波器生成。 下行音频可以通过插值与高数据速率的抗噪声信号组合。 控制路径中的高通滤波器减少了ANC电路中的DC偏移，并且当未检测到下行链路音频时，可以停止ANC系数适配。

    DIGITAL HIGH FREQUENCY PHASE COMPENSATION
    8.
    发明申请
    DIGITAL HIGH FREQUENCY PHASE COMPENSATION 有权
    数字高频相位补偿

    公开(公告)号：US20100272283A1

    公开(公告)日：2010-10-28

    申请号：US12750309

    申请日：2010-03-30

    申请人： Ricardo F. Carreras ,  Daniel M. Gauger, JR. ,  Steven H. Isabelle

    发明人： Ricardo F. Carreras ,  Daniel M. Gauger, JR. ,  Steven H. Isabelle

    IPC分类号： G10K11/16

    CPC分类号： G10K11/178 ,  G10K2210/3028 ,  G10K2210/3044 ,  G10K2210/3051

    摘要： In an ANR circuit of a personal ANR device, a digital filter is structured to introduce one or more zeros to add gain to introduce positive phase in the provision of feedback-based ANR, wherein the gain follows a frequency-dependent “ski-slope” gain curve with little gain added at lower audible frequencies, with increasing gain that increases with frequency added at higher audible frequencies, and with the increasing gain flattening at frequencies above audible frequencies.

    摘要翻译： 在个人ANR设备的ANR电路中，数字滤波器被构造为引入一个或多个零点以增加增益以在提供基于反馈的ANR中引入正相位，其中增益遵循频率依赖的“滑坡” 增益曲线在较低的可听频率处增加了很少的增益，随着增益的增加，随着在更高的可听频率处的频率增加而增加，并且随着在可听频率之上的频率上增加的增益变平。

    Color cathode ray tube
    10.
    发明申请
    Color cathode ray tube 失效
    彩色阴极射线管

    公开(公告)号：US20010006322A1

    公开(公告)日：2001-07-05

    申请号：US09756166

    申请日：2001-01-09

    发明人： Go Uchida ,  Syoji Shirai

    IPC分类号： H01J029/50

    CPC分类号： G10K11/178 ,  G10K2210/3025 ,  G10K2210/3032 ,  G10K2210/3045 ,  G10K2210/3051 ,  G10K2210/503 ,  H01J29/503

    摘要： A color cathode ray tube equipped with an in-line electron gun comprising three cathodes for emitting three electron beams of an in-line arrangement toward a fluorescent screen, and a main lens for focusing the aid three electron beams on the fluorescent screen. The main lens includes a first main lens electrode and a second main lens electrode arranged in a spaced relationship in a direction of an axis of the tube and having different voltages applied thereto. Each of the first and second main lens electrodes have a single opening common to the three electron beams at opposing ends thereof, and at least one of the first main lens electrode and the second main lens electrode have therein three apertures for electron beam passage which are set back from the opposing ends, wherein T and S have values in the region where the following inequalities are satisfied,2Snull14.6nullTnull28.1, and4.1nullS,S being a beam spacing in mm between central axes of the three electron beams at the main lens, and T being an outside diameter in mm of a neck portion of a vacuum envelope housing the in-line electron gun.

    摘要翻译： 一种装有直列式电子枪的彩色阴极射线管，包括三个阴极，用于将荧光屏上的串联排列的三个电子束和用于将三个电子束聚焦在荧光屏上的主透镜。 主透镜包括第一主透镜电极和第二主透镜电极，该第一主透镜电极和第二主透镜电极在管的轴线方向上以间隔开的关系布置，并且施加有不同的电压。 第一主透镜电极和第二主透镜电极中的每一个具有在其相对端处与三个电子束共同的单个开口，并且第一主透镜电极和第二主透镜电极中的至少一个具有三个用于电子束通过的孔， 从相对端返回，其中T和S在满足以下不等式的区域中具有值，<段落lvl =“0”> 2S + 14.6 <= T <= 28.1， / in-line-formula> <段落lvl =“0”> 4.1 <= S， S是三束电子束的中心轴之间的光束间距 在主透镜上，T是容纳直列式电子枪的真空外壳的颈部的外径（mm）。